Hamilton lindsay



March 9 1926.

. H. LINDSAY SEAM FDR WOVEN WIRE BELTS Original Filed 1922 2 Sheets-Shut 1 n r m:

March 9,1926. Re. 16,290

H. LINDSAY sum FOR WOVEN WIRE EL'rs Original Filed 1922 2 Sheets-Sheet 2 Fla-6 w lvmnzvdolai :51, ZMMw 6 444 Q attain Reisaued Mar. 9, 1926.

UNITED STATES PATENT OFFICE.

HAMILTON LINDSAY, or CLEVELAND, oH'Io, ASSIGNOB TO THE LINDSAY wmn wnav- 11m COMPANY, or cLnvELANn'on o, A CORPORATION or 01110.

seam FOR WOVEN-WIRE BELTS.

Original 10. 1,464,847, dated T 0 all whom it may concern Be it known that I, HAMILTON LINDSAY, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in. a Seam for Woven-Wire Belts, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings}.1

is invention relates to a method of joining the ends of a wire fabric to form an endless belt which is particularly useful in Fourdrinier paper machines. More particularly, my invention is concerned with a seam for lacing the ends of a belt having a special weave as set forth in my copending application, Serial No. 525,403, filed Dec. 28, 1921.

Briefly, the belt illustrated in my copending application embodies a fabric wherem the lower knuckles of the longitudinally extending or warp wires pass continuously beneath two or more crofi or woof wires instead of onl one. Accordingly, the warp wires are divided into grou 5, each preferably of three wires in number, during the weavingv operation, and are manipulated so that one group forms one plane of the shed while the other two groups form the other plane of the shed, while the shuttle passes therebetween and across the loom. These groups are interchan ed after each stroke of t e shuttle where y the fabric so formed has short knuckles on the upper side of the belt and long knuckles on the lower side thereof. This results in a construction which gives a longer wearing surface to the under side of the belt, thus increasing the life thereof. One of the difliculties encountered in joining the ends of the belt above described is the provision of a seam which (10% not fill the interstices, (which would render it diflicult for water to pass through this scam when the belt is in use) and at the same time forms a suflicient support between the ends 0f the fabric so as not to strain the pulp. Another difiiculty is the arrangement of closing wires which do not dislace the woof wires so as to distort the mes Accordingly, one of the objects of my invention is the provision of a seam having a suflicient space for the passage of water August 14, 1923, Serial No. 607,557,

reissue filed June 5, 1925. Seria1' No. 35,243.

filed December 18, 1922. Application for therethrough, and sufficient support between the ends of the fabric so that the pulp is properly drained and at the same time supported adjacent the seam, whereby the paper is not weakened. Another object is the provision of aseam for use in a belt constructed in the manner above set forth which'will.

not weaken the wires adjacent the ends of the fabric. Furthermore, my invention includes a seam, the wires of which lie in substantially the same plane as the warp wires so that the wear occasioned by the passage of the seam across a suction box is not greater than thatoccurring on other parts of they belt.

The referred embodiment for carrying out my invention is illustrated in connection with the accompanying drawings, and is hereinafter described in detail. The essential features are summarized in the claims. In the drawings, Figures 1 and 2 are plan views illustrating the ends of a belt havin a weave constructed as'heretofore described and illustrating the application of a stitching wire, wherein Fig. 1 shows the top side of the belt, while Fig. 2 shows the bottom side thereof; Figs. 3 and 4:. are views similar to Figs. 1 and 2 and show the application of a second stitching wire; Figs. 5 and 6 are views corresponding to Figs. 3 and 4 with the application of a closing wire; Figs. 7, 8, and 9 are sections taken on the corresponding lines in Figs. 1, 3, and 5 respectively.

As shown in Figs. 1 to 6, Aindicates the longitudinal or warp wires of the fabric and B the transverse or woof wires. In Figs. 7 to 9, the foremost warp wire A passes over the transverse wire B thence eneath two transverse wires B and B over the wire B, and thence beneath the next two transverse wires of which one only is shown at B. The next warp wire indicated at A passes beneath the two woof wires B and B, thence over the woof wire B, thence beneath the two woof wires B and B, etc. The third warp wire A,- shown particularly in Fig. 1, passes, beneath the woof wire B over the woof wire B, thence beneath the two woof wires B and B, over the woof wire B etc. The transverse wires B to B'are illustrated as being on one end of the belt. The corresponding while transverse wires on the opposite end of the belt are indicated as BB BB BB, BB, and BB respectively.

The described construction is illustrated by reference characters, particularly in the upper half of Fig. 1, but the weave is the same for all figures illustrated. With this construction then, the .fourth warp wire would correspond to the wire A, the fifth to the wire A, etc. .'whereupon the woof wires lie alternately over two and beneath one warp wire, etc.

The fabric shown and described thus has on its under side a series of long longitudinal knuckles, in contradistinction to the short or abrupt knuckles on the upper side. Accordingly, every third warp wire adjacent the same woof wire has a short knuckle on the upper side, as is shown particularly in Fig. 1, wherein the wire B has short knuckles on the top side indicated at 10 to 14. etc. Similarly. the wire B on the top side of the fabric has short knuckles, each positioned one warp wire to the left of those forming the short knuckles overthe wire B Accordingly the short knuckles for the wire B are indicated at 16 to 19, etc.

The short knuckles 10. 14 and 16 to 19 above referred to are shown in the various figures as being located on the upper region of the belt. .The corresponding short knuckles on the lower region of the belt are indicated at 10 to 13 and also at 16 to 20 respectively.

My invention, as heretofore stated, embodies a seam for closing the ends of a belt having a weave as heretofore described. To this end, I have shown in Figs. 1 and 2 the first step in forming the seam as embodying stitching wires S and S which extend over the ends of the fabric and on opposite sides thereof to form loops for receivlng the dos ing wires as will hereinafter be described.

Each stitching wire is carried back at the end of the belt a distance of one or more woof wires whereby the stresses on the closing wire incident to the tension on the belt during operation will not pull the woof threads out of the fabric. Accordingly I have shown a stitching wire S in Fig. 1 as passing over the woof wire B and to the left of the short knuckles 10 to 14. This brings the inner loops of the stitching wire over a woof wire which is held in position on one side by the short knuckles 10 to 14, and on the other side by the short knuckles 16 to 20 which, as heretofore stated, are over the next woof wire toward the end of the belt. In this way, the woof wire is not distorted when tension is placed upon the belt. The outer loops of the stitching wire S are shown as passing around the woof wire B and in such position as to avoid the knuckles on the top and bottom sides of the fabric adjacent the ends thereof. Thus the stitching wire lies substantially in the same plane as the warp wires whereby undue wear on the stitching .wire, such as occasioned by the travel of a belt over the suction box in paper machines, is materially prevented. Accordingly, the stitching wire is threaded through every third row and the outer loop occurs in a row adjacent to the row in which an inner loop occurs. The weave of the stitching wire is employed in the same manner on both ends of the belt.

In Figs. 3 and 4, I have shown the next step in the making of a seam, namely the weaving of a second stitching wire S and S. This stitching wire, however, also passes preferably through every third row and over the same woof wire but in rows different from those through which the first stitching wires extend. The second stitching wire thus forms a set of outer loops in rows different from those occupied by the first stitching wire but the 'inner loops of the second stitcl'iing wire occur in. the same row as the outer loops on the first stitching wire. This prevents thecrossing of one stitching wire over another adjacent a short knuckle and thus minimizes the wear occasioned by the travel of the belt-across the suction boxes. By placing the inner loops of the second stitching wire over a woof wire different from those over which the first stitching wire extends, I may still position the To close the belt. I provide a single clos ing wire C. This closing wire extends from one end of the belt tothe other end and alternately between outer loops of the two sets of stitching wires. An important consideration in 'the formation of the seams is't-he PIOX lSlOH of sufficient support for that portion of the pulp adjacent the seam. Accordingly, a single closing wire joining the alternate loops formed by two stitching wires provides a mesh substantially the same as the continuation of the warp wires. Moreover. as shown in Figs. 5 and 6, the closing wires on the under side of the belt are approximately parallel to the warp wires, wherebythe wear on the under side of the belt is reduced to minimum.

The single closing wire is therefore looped around each end of the belt and around the end woof wire at each end of the belt. Moreover the closing wire loops are arranged to skip one warp wire and then two warp wires {)nl succession throughout the width of the A seam constructed according to' my invention transmits the operating stresses to woof wires remote from the ends of the belt and at the same time provides an anchorage adjacent short knuckles, whereby movement or displacement of any woof wire is prevented. The proper drainage is not interfered with, and at the same time the pulp is properly supported. A further feature set forth by my invention is the positioning of the stitching and closing wires so as to maintain the wires forming the seam within the same plane as the warp wires. In this way, the wear on the seam and cloth is substantially uniform.

I claim:

1. A seam for an endless belt wherein the weave comprises warp wires and woof wires,

r the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires passing through one end of the belt, at least one of the wires passing through the belt adjacent a short warp knuckle and forming loops adjacent the end of the belt, and a closing wire connecting said loops,

2. A seam for an endless'belt wherein the weave comprises warp wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacentone end of the belt, one of the stitching wirespassing through the belt adjacent a short knuckle and formingloops adjacent the ends of the belt, and a closing wirepassing through said loops for joining the ends of the belt.

3. A seam for an endless belt wherein the weave comprises warp wires and woof wires, the warp wires having long knuckles on one side of the belt-and short knuckles on the other side thereof, having two stitching wires at one end of the belt, each of said wires passing through the belt adjacent a short warp knuckle, and a closing wire passing alternately through said loops and oining the ends of the belt. I

4. A seam for an endless belt wherein the weave comprises warp wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent one end .of the belt, the stitching wires forming outer loops over the same woof wire and forming inner 100 s over different woof wires, atleast one of tlie stitching wires passing through the belt adjacent a short warp knuckle, and a closing wire passing alternately through said loops and joining the ends of the belt.

5. A seam for an endless belt wherein the weave comprises warp. wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires passing through one end of the belt and adjacent different rows to form outer loops, one of said stitching wires passing through the belt so as to form inner loops, each inner loo passing over a woof wire which has a s 'ort warp knuckle adjacent said loop, and a closing wire passing alter-i nately through said outer loops for joining the ends of the belt.

6. A seam for an endless belt wherein the weave comprises warp wires and woof wires,

the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires threaded through one end of the belt so as to form outer loops over the same woof wire and to form inner loops over different woof wires, the inner loop ofone wire occupying the same row as the outer loop of the other ,wire, said stitching wires passing through the belt over inner woof wires, the

warp wire on one side of the stitching wires side of the belt and short knuckles on the other side thereof, having two stitching wires and a closing wire, one of said stitching wires eaten ding over a woof wire remote from the endof thebelt, the warp wire on one sideof the stitching "wire having a short warp knuckle adjacent to the woof wire, and the warp wire on the other side of the stitching wir forming a short knuckle on the adjacent woof wire.

8. A seam for an endless belt wherein the weave comprises warp wires and woof wires,

the warp wires having long buckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent one end of the belt, each of said. stitching wires passing through the belt over different woof wires, and each of said woof wires having a short warp knuckle adjacent said stitching wires, at least one of said stitching wires being passedaround the end of thebelt to form loops, and a closing wire extending across the ends of the belt and passing through said loops.

9. A seam for an endless belt wherein the weave comprises warp wires and woof wires, the war wires having long knuckles on one side 0 the belt and short'knuckles on the other side thereof, having two stitching wires passingaround the end of the belt to form outer and inner loops,.the outer loops occupying different rows and the inner loops passing over woof wires in such position that the short warp knucklepasses over the woof wire adjacent said stitching wire, and a. closing wire extending across the end of the belt and passing through the loops in one .of the stitching wires.

10. A seam for an endless belt wherein the weave comprlses warp wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent one end of the belt, said stitching wires forming outer loops over the same woof wire and inner loops over difi'er-' ent woof wires, all of the inner loops of one stitching wire being over the same woof wire, and each woofwire having a short warp knuckle on one side of the stitching wire, and a closing wire passing alternately through said outer loops for joining the ends of the belt.

11.- A seam for an endless belt wherein the weave comprises warp wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the-other side thereof, having two stitching wires passing over one end of the belt so as to provide outer and innerloops, each inner loop being positioned on every third row and adjacent a short warp knuckle, and

a closing wire passing across the ends of the belt and passing through the outer loops in one of the stitching wires.

12. A seam for an endless belt wherein the weave comprises warp wires and woof wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent each end of the belt, each stitching wire forming outer loops over the end of the belt and inner loops over an inner woof wire and adjacent a .short warp knuckle, and a closing wire passing alter cession, and means for holding the end woof 'wires 1n position.

14. A seam for an endless belt having a single closing wire looped around the ends of the belt, the loops being arranged to skip one warp wire and then two warp wires in succession, all of said loops on both ends of the belt passing over the end woof wires, and means for holding the end woof wires in adjusted position.

15. A seam for an endless belt having a closing wire connecting the ends of the belt, said wire having loops which on one end of the belt are arranged to skip one warp wire and then two warp wires in succession.

16. A seam for'an endless belt having a closing wire connecting the ends of the belt, said wire having loops which on each end of the belt are arranged to skip one warp wire and then two warp wires in succession, and means other than the closing wire for retaining the end woof wires in place.

In testimony whereof I hereunto afiix my signature.

HAMILTON LINDSAY. 

